In honor of reaching 60 million likes on Facebook, the actor used the milestone to share a personal and heart-warming new video he made of his pal and "Fast & Furious" co-star Walker, who died in a fiery car crash on Nov. 30.

"A glimpse... of Dom and Brian… off screen," he wrote on Monday night, referring to their "Fast & Furious" characters.

The footage, which runs for 18 and a half minutes, features various clips of them spending time together through the years — both behind-the-scenes and promoting their film franchise. It's often very light-hearted and fun, showing them goofing around (often around cars) and laughing a lot. But it does have more loaded moments — like Walker talking about the car James Dean died in. It ends with a simple but poignant message: "Miss you…"

And, needless to say, you'll need a tissue. It's hard to look at Walker's movie star smile — or his sweet friendship with Diesel — without wondering: What if…

A day before Diesel posted the video, he hinted that he had something special in the works, telling his fans, "You have always been so supportive, especially in these past two months. So, I wanted to share something personal that I worked on through the New Year, in honor of my brother Pablo… Paul."